Watch stem



A Dec.`1, 1931. s, 1 GREENWAY 1,834,152

WATCH STEM Filed Sept. 14. 1929 Patented Dc. l, y1931 N "UNITED STATESl IANY, or ELGIN, ILLINOIS, A ocation'Arionv oF ILLINOIS j j .WATCH sm L .Application .tiled September 14,1929. Serial No. 392,592.

V1o einpliiication, the accompanying drawings shows in Figure 1 a fragmentary view of a Watch case partly broken away to' exhibit a portion of the enclosed movement to which is connected the` present stem assembly; Fig. 16 2 a central lon-gitudinal section through the axis ofthe stem and associated parts, the stem being shown in elevation; and Figf a similar view modified in therespect that the wall of the watch case is recessed to receive the enlarged head at the inner bushing end.

The watch case A'herein illustrated is provided with a side wall 4 l(single, double, or otherwise) having an aperture 5 for receiv ing 'the neck of a bushing B whose head 7 is laterally extended to bear against the inner face of the case wall. Against the 0pposite face of this wall is presented a shoulder 8 forming one end of the bushing body 9 the surface of which is slightly tapered toward its outer end. A cylindrical chamber 10 extends into the bushing body from its outer end to communicate with its axial bore, and within this chamber is accommodated the post 11 of a crown Cv having formed in its inner face an annular recess 12 receiving the outer end of the.y bushing B. .With the crown post bearing against the inner end of the chamber within the bushing, the tapered outer surface of the latter extends closely past the edge of the crown recess 12; and the outer end ofthe bushing, as well as its surface interiorly of the chamberr 10, just clears the proximate faces of the crown so that the latter may rotate relative to the bushing free of friction except at the inner end of the chamber 10. This is the normal position of the crown in relation to the parts just described. Y

The crown is mounted upon the outer end of a stein D.y Within the crown post is a SAMUEL J'. GREENWAY, OF ELGIN, ILLINOIS,

threadedsocketiwherein vis tightly screwedy i i the threaded outer end rof the stemy the'exe tremity of whichdesirably abuts the bottom of the post socket; 'Formed on the stem is ax'coliarl;` having a' beveled outer edge 17 adapted,^whenthe stem is shifted outwardly,l

to engagea beveled rface 18 on the inner end of .thebushing head. :With the stem pushed in-to"` the normalposition already described, thecollarjisspacedslightly from the bushing head, buttoy theextent of the 'distance betweenthe latter and the collar thestem may, upon occasioin'be l-shifted outwardly setting the watch hands- Beyond the lcollar the Stem .cross section isf vari'echto provide `naled within a suitable vbearing carried by the movement. AIn the construction of Fig. 3 exactly the same construction is presented with the single exception that the length of the bushing is reduced to permit its head 7 to lie within a recess 20 provided on the inner face of ythe case wall 4:.

The present stem assembly is advantageous in several particulars. The bushing which furnishes an outer bearing for the stem is itself locked securely to the case and in a manner which protects the parts interiorly thereof. Regardless ofthe endwise position of the stein, the bushing continues to closely surround the stem so as to maintain this protection for the watch movement.`l The out position of kthe stem is determined by the collar engaging the inner end of the bushing, and in this shift the collar provides a positive stop which is independent of the watch movement.

I claim: Y 1. In a watch case, a non-pull out watch stem assembly which comprises a bushing when the crown is to be manipulated for having a neck extended through awall of the case, a hea-d at the inner bushing end engaging the inner face of the case Wall and a shoulder spaced from the head engagingr the outer face of the case wall whereby the bushing'is locked immovably in place, there being 'an axial bore through the bushing enlarged at its outer end to provide a. chamber, a stem extending through the bushing and into said chamber and freely shiftable length- Wise of itself Within the bushing, a, crown 5 formed with a socketed post, there being an annular recess surroundin the `post for re ceiving the bushing end, t e post socket receiving the outer stem end, means for connecting the crown fiXedly to the stem, `and a H, stop carried by and affixed to the stem remote from its inner end normally spaced from the bushing adapted to engage the inner end thereof when the stem is shiftedout- Wardly. f Y i 2. In a Watch case, a non-pull out watch stem assembly which comprises a bushing extended through one wall thereof and secured immovably thereto, there being anl axial socket formed in each bushing end, a crown hav- 2 ing a socketed post extending into the outer bushing socket, a stem shiftably journaled v in the bushing and extended into the socket of the Crown post for connection therewith, and means carried by the stem remote from its inner end adapted when the stem is shifted outwardly to engage Within the socket in the inner bushing end whereby to limit the endwise movement of the stem in one direction. so In testimony whereof, I have hereunto set my hand this 12th day of Sept., 1929.

' SAMUEL J. GREENWAY. 

